In order to improve the sedimentation performance of biogas slurry and reduce the COD, microwave-enhanced advanced oxidation process (MW/H2O2-AOP) was used to pretreat the cow manure biogas slurry. A laboratory-scale microwave reactor was used to strengthen the H2O2 advanced oxidation process to achieve the solid-liquid separation of biogas slurry which was difficult to be settled. The results showed that the maximum COD removal efficiency reached 68.8% when pH, H2O2/total solid, microwave time and microwave power were 3, 0.4, 5 min and 300W, respectively. COD was reduced from 24157 mg/L to 7536 mg/L, and the settlings volume was reduced to 38%, while other pollutants such as the total solid and total dissolved solid were significantly reduced. Total solid and total dissolved solid removal efficiency reached 50.0% and 62.0%, respectively. Since no other agents were added, MW/H2O2-AOP can effectively reduce secondary pollution and reduce the cost of treatment.

中文翻译：

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牛粪厌氧消化池沼液的微波强化高级氧化工艺

为了提高沼液的沉淀性能，降低COD，采用微波增强高级氧化工艺（MW/H2O2-AOP）对牛粪沼液进行预处理。采用实验室级微波反应器强化H2O2高级氧化工艺，实现难以沉降的沼液固液分离。结果表明，当pH、H2O2/总固体、微波时间和微波功率分别为3、0.4、5 min和300W时，COD去除效率最高可达68.8%。COD从24157mg/L降低到7536mg/L，沉降量降低到38%，其他污染物如总固体和总溶解固体显着降低。总固体和总溶解固体去除效率分别达到50.0%和62.0%。